<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="js/vue.min.js"></script>
</head>
<body>
    <h1>hello!</h1>
    <div id="app">
        {{name}}
        {{age}}
    </div>
    <div id="app">  
        {{name}}
    </div>
</body>
</html>
<script>
    var vm=new Vue({
        el:"#app",
        data:{
            name:'lr',
            age:18
        }
    });

</script>